Steam generator



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.F. LIVET.

' STEAM GENERATOR. No. 295,775. .Patented Mar. 25, 1884..

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l 3 Sheets-Sheet' 2. P. LIVBT. STEAM GENERATOR.

No. 295,775. Patented M55. 25, 1884.-

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F. LIVET.'

STEAM GENERATOR.

No. 295,775. Patented" M51. 25. 1854.

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WITNESSESV UNITED STATES PATENT OFFICE.

FOUNTAIN LIVET, OF LONDON, COUNTY OF MIDDLESEX, ENGLAND.

`STEAM-eENEFm'ToR.

SPECIFICATION foiming part of Letters Patent Ne. 295,775, dated Maron 25.18184. Application led October 13, 1883. (No modell Patented in England August 18,1883, No. 4,007.

. To all whom it may concern: y

Be it known that I, FOUNTAIN Livr-ir, asubject of the Queen of- GreatBritain and Ireland, W

specification.

`This invention relates to certain improvements in the construction of internally-fired high-pressure steam-generators, as described in the Letters Patent granted to me November 6, 1883, No. 288,079. 4

My invention consists in a novel construci tion and combination of parts, whereby economy is secured by obtaining a maximum available heating-surface with a minimum fuel con- ,y rsumption, combined with greater facility for cleaning and inspection and a minimum contact of brick-work with the boiler.

Figure 1 is a sectional plan view through the iiues about the two lower cylinders. Fig. 2 is a sectional plan through the iiues around the upper cylinder. Fig. 3 is a vertical longitudinal section. Fig. 4 is a transverse vertical section through the cylinders and connectingtubes, and Fig. 5 is a sectional view through the upper cylinder'and ilues at the ends of the two lower cylinders.

I will now proceed with a description of my improvements, aided by the drawings attached;

The boiler is of a compound nature, and consists of two lower cylindrical tubes, A and B, made preferably not more than vefeet in diameter, having iiat endsand one furnace-tube in each. A and B are connected by several conical tubes, D, to one upper cylinder, E, e

which may be from five to six feet in diameter. The crown of each furnace-tube C slopes up from, say, the second expansion.- ring-to a point over the back end of the bridge, rising some four or five inches inall, as shown at F, Fig. 3, and in the expanded portion of the furnacetubes conical or other cross tubes may be placed in the ordinary way. The upper cylinder, E,

is connected by conical tubes D to the lower 5o cylinders, A and B. Thse tubes are about y double the area at the top H,where connected to the upper cylinder, than that at the lower end, J, connected with thelower cylinders, A and B, the weight of the upper cylinder being entirely supported by the connecting-tubes D. The water-level is maintained a little above the half of the diameter of the upper cylinder, E, the space between such water-level and the top of the cylinder serving as a steam-chest, and the whole boiler is supported on any convenicnt number of cast-'iron saddles, K, under the lower cylinders, A and B.

In describing the course of the nues-I will follow the current from one of the lower cylindrical tubes, both iiues being the same. The current is on the wheel-draft principle. The l gases pass through the furnace-tube C into an expansion-chamber, L, having a deep pit or receptacle belo"`w the level of the side iiues for the reception of grit. They then pass into a side flue, N, the top of which is carried up to the apex O of the lower cylinder, and the bottom of whichis of inverted-arch form l?. The sectional area of this first iiue, N, is larger than that of the furnace-tube C, and it is placed on the outside of the boiler farthest away from the center( The gases then pass into another expansion-chamber at Q, the sectional area of which is greater than that of the first flue N, and they then emerge into the second side flue, R, the area of which is greater than the sectional area of the second expansion-chamber, Q. The gases from both lower cylinders, A and B, then pass into the end chamber, S, and rise up under the end of the upper cylinder into a side flue, T, of larger sectional area than both the second return-fines, R, of the lower cylinders, and continue across under the front of the upper cylinder into another flue, U, larger than the last-named side iiue, T. Thus the gases pass in one continuous flue iive times the length of the boiler before going through the damper-Hue Z into the chimney.

The divisions between each pair of side iiue's are'effected by a wall surmounted by a semicircnlar brick coping only just imping- In testimony whereof I have signed my naine ing upon the shell of the respective cylinders to this specification in the presence of two subat W. scribing witnesses.

What I claim as my invention isW 5 The combination of boiler-tubes A, B, and FOUNTAIN LIVET.

E, the latter supported by the irst two, With iiues N, R, T, and U, and expansion-chambers Witnesses: L and R, the said fines and chambers being of JOHN DEAN, successively increased sectional area, substan- J. WATT,

Io tially as described. Both of 17 Goacechzwch Sli/reet, London. 

